/*
 *	macaddr
 *
 *	Program to return the MAC address of an Ethernet
 *	adapter.  This was written to help configure the
 *	adapter based on the MAC address rather than the
 *	name.
 *
 *	Version 1.0	Eric Dittman	2001-10-19
 *
 *	This is released unther the GPL license.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>

#include "iwlib.h"

int main(int argc, char** argv)
{

    int devsock;
    struct ifreq ifbuffer;
    char buf[20];

    if ((argc != 2) || (argv[1][0] == '-')) {
        printf("Usage: macaddr interface\n");
        exit(1);
    }

    devsock = socket(AF_INET, SOCK_STREAM, 0);

    if (devsock == -1) {
        perror("Failed opening socket");
        exit (1);
    }

    memset(&ifbuffer, 0, sizeof(ifbuffer));
    strncpy(ifbuffer.ifr_name, argv[1], sizeof(ifbuffer.ifr_name));
    if (ioctl(devsock, SIOCGIFHWADDR, &ifbuffer) == -1) {
        fprintf(stderr, "There is no MACADDR for %s\n", argv[1]);
        exit(1);
    }
    close(devsock);

    puts(iw_saether_ntop(&ifbuffer.ifr_ifru.ifru_hwaddr, buf));

    exit(0);
}
